Composition for laying road-dust.



COMPOSITION FOR LAYING RQAD-DUST.

Specification of Letters Patent.

Patented Dec. 1, 1914.

No Drawing. Application filed September 9, 1907, Serial No. 391,886. Renewed October 20, i914. Serial To all whom it may concern:

Be it known that I, CAnLn'roN ELLIS, a

citizen of the United States, and a resident of Larchmont, in the county -of Westchester and State of New York, have invented certain new and useful Improvements in Compositions for- Laying Road-Dust, of which the following is a specification.

This invention relates to an improved composition of matter for laying road dust and preventing the occurrence of dust thereon and comprises waste sulfite cellulose liquor from paper mills and a softening agent either of a hydroscopio character, such as a deliquescent salt or of an oily character,-

such as a non-tarry oil, or both.

This application is directed to a composition for laying road dust, as is also Letters PatentNo. 865,578, for a composition for laying road dust granted to me September 10, 1907, this application having been copending with the application upon which i drying on exposure, to the air to form a hard brittle mass, a property which renders it less fit for use by itself as a dust-layer. The addition of a softening. compound how'- ever overcomes this objection and adapts the liquor for general use in the prevention of road dust.

The softening agent which I preferably employ is a deliquescent salt such as the chlorid of calcium or magnesium. The amount which may be added to the liquor is dependent on the concentration and quality of the said liquor. Too great a quantity of the chlorid salts out the lignosulfonate or other bodies present in the liquor. I prefer to use a fairly large amount of the deliquescent body, not sufficient to salt out but enough to cause some part at least of the otherwise soluble constituents of the liquor to assume a colloidal or gelatinous state. In this condition the liquor seems particularly effective. Another softening agent that may be used to advantage is a tionable.

non-tarry oil. The selection of the oil or oily body is of some importance. Heavy petroleum oils free from tar are best. Tarry matter, as distinguished from oily matter or oily bodies, is, generally speaking, objec- When -well prepared from tarfree oils, there appears to be a combination of the oily matter with the components of the .emulsifies much better. and spreads throughout the body of the solid residue much more readily than in the case of a tarry oil.

An illustrative formula representing the preferred form of my invention consists of 100 parts by weight of 30 Baum liquor, 15 parts of water in which is, dissolved 10 parts of commercial calcium chlorid and 25 parts of petroleum oil. The 25 partsof the calcium chlorid solution are added with stirring gradually to the liquor and the oil then emulsified into the resulti'ng mixture.

Obviously other salts than those mentioned may be used or added but calcium and magnesium chlorids are especially useful because of their powerful hydroscopic action and cheapness. A modicum of a disinfectant such as creosote is sometimes roads being of course, as is well known,

composed largely of clay or clay-yielding materials, whereby a road comprising clay or clay-yielding materials, and having its surface coated or sprinkled with a body of concentrated sulfite waste liquor, is obtained.

As the odor of petroleum is held by some as objectionable and as its action on rubber tires is sometimes marked I prefer to use not more than. 20 to 25 per cent of oil in my compositions and in many cases omit the oil entirely,

An iniprovecl composition Without oil conr sists of concentrated sulfite liquor 100 parts mixed with 20 parts of a 25% solution of calcium and magnesium chloride; the salts being present in equal proportions. For ordinary highways the latter composition is oftentimes preferable While for railroad} loeds the preparation containing 20% or so of oil is highly satisfactory.

What I claim is l. A. composition for laying road dust comprising an emulsion of Waste sulfite liqnor of 30 Baum and. as a softening agent a non-tarry petroleum oil.

2. A composition for laying roaol dust comprising an emulsion of sullite liqnor of 30 Bainn and an oily body, said oily body being present in an amount not exceeding twenty-five per cent 3 A composition for laying mail oust comprising concentrated. Waste suliite liquor and an oily body said oily body being present in an. amount not enceedine' 25 percentum.

43 A composition for laying road dust comprising concentrated Waste sulfite liquor, a hydiqoscopic softening agent and a nontarry oily laocly.

5. A composition for laying road dust comprising concentrated Waste sullite liquor and. a substantially tanfree oil.

6. A composition for laying roaol dust consisting of 100 parts of concentrated Waste sullite liquor having a substantially neutral reaction, loparts of Water, 10 parts calcium cliloi'id and 25 parts ofoil.

Signecl at Lerchmont, in the county of Westcloester and State of New York, this sixth (lay oi? September A. D. 1907.

G tlslLlE'llON ELLIS. Witnesses:

NATHANIEL L. l osunn, SAMUEL R. Benn, 

